body,html
  line-height: 1
  font-weight: 200
  font-family: 'PingFang SC','STHeitiSC-Light','Helvetica-Light',arial,sans-serif

.clearfix
    display: inline-block
    &:after
        display: block 
        content:'.'
        height: 0
        line-height: 0
        clear: both
        visibility: hidden

@media(-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
    .border-1px
        &::after
            -webkit-transform: scaley(0.7)
            transform: scaleY(0.7)

@media(-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
    .border-1px
        &::after
            -webkit-transform: scaley(0.5)
            transform: scaleY(0.5)